JPS63286596A - One-side plating method for steel strip - Google Patents
One-side plating method for steel stripInfo
- Publication number
- JPS63286596A JPS63286596A JP12021187A JP12021187A JPS63286596A JP S63286596 A JPS63286596 A JP S63286596A JP 12021187 A JP12021187 A JP 12021187A JP 12021187 A JP12021187 A JP 12021187A JP S63286596 A JPS63286596 A JP S63286596A
- Authority
- JP
- Japan
- Prior art keywords
- plating
- steel strip
- strip
- soln
- edges
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007747 plating Methods 0.000 title claims abstract description 65
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 44
- 239000010959 steel Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims description 14
- 238000007664 blowing Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、鋼帯の片面めっき方法に係り、特に水平式め
っき（を用いて鋼帯の片面もしくは片面ずつを交互に連
続的に錫あるいは亜鉛などをめっきする際の鋼帯二ノジ
での非めっき面への流れ込みやオーバコートを防止する
のに好適な鋼帯の片面めっき方法に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for single-sided plating of steel strips, and in particular, horizontal plating (using horizontal plating) to alternately and continuously coat one side or one side of a steel strip with tin or The present invention relates to a method for single-sided plating of a steel strip, which is suitable for preventing overcoating or flowing onto the non-plated surface of the steel strip when plating zinc or the like.
〈従来の技術〉
従来から、口帯の片面もしくは片面ずつ交互に連続的に
錫めっきを施す代表例の一つであるハロゲン法は、パス
ラインが水平であるから通板が容易であること、かつ高
電流密度にすることが可能であることなどから高速ライ
ンに適用されている。<Conventional technology> The halogen method, which is one of the representative examples of continuously applying tin plating on one side or alternately one side at a time, has the advantage of easy threading because the pass line is horizontal. It is also applied to high-speed lines because it can achieve high current density.
以下、このハロゲンラインについて第４図を用いて詳し
く説明する。Hereinafter, this halogen line will be explained in detail using FIG. 4.
図において、２つのめっきセクション１１．１２は上下
２段に分けて配設され、それぞれ複数の水平式のめっき
槽７から構成される。各めっき槽７の間には、コンデク
クロール５．バツクアツプロール６が設置され、各めっ
き槽７の槽内にはアノード４および錫３が配設されてい
る。各めっき槽７内のめっき液２は、最下段のサーキュ
レーシゴンタンク８からポンプ９により配管１０を介し
て常に循環される。In the figure, two plating sections 11 and 12 are arranged in upper and lower stages, each of which is composed of a plurality of horizontal plating tanks 7. Between each plating tank 7 is a condek crawl 5. A backup roll 6 is installed, and an anode 4 and tin 3 are placed inside each plating tank 7. The plating solution 2 in each plating tank 7 is constantly circulated from the lowest circulation tank 8 via a pipe 10 by a pump 9.
矢示方向から進入してきた口寄１は、まずめっきセクシ
ョン１１において第４図（ｂ）の断面図に示すようにそ
の下方の片面’１ ａのみがめつき液２の液面と直接接
触してめっきが施され、ついでめっきセクション１２に
おいてもう一方の片ｉ１ｂのめっきが施されるのである
。First, as shown in the cross-sectional view of FIG. 4(b), the plating section 1 entering from the direction of the arrow directly contacts the surface of the plating solution 2 with only its lower surface '1a'. Plating is applied, and then the other piece i1b is plated in the plating section 12.
〈発明が解決しようとする問題点〉
ところで、前述のように鋼帯１の片面１ａにめっきを施
すとき、めっき液との非接触部分をなくすようにめっき
液２の液面を鋼帯１のパスラインに対して若干高めに保
つようにするから、鋼帯１の走行にともない第５図に示
すように鋼帯ｌの上方即ち非めっき面１ｂ側にめっき液
２が巻き込まれた状態で流れ込み、その非めっき面１ｂ
の端部１ｃにもめっきされることになる。そのため、片
面のみのめっき製品の場合は後工程における塗装などの
表面処理の際に美麗さを損なうなどの悪影響を及ぼすか
ら、予め端部を切って取除くために多大な工数を要し間
装である。また、両面めっき製品の場合は、次のめっき
セクションで非めっき面１ｂをめっきする際めっき層厚
が厚くなって品質１歩留りなどの問題を生ずる。<Problems to be Solved by the Invention> By the way, when plating one side 1a of the steel strip 1 as described above, the liquid level of the plating solution 2 is adjusted to the surface of the steel strip 1 so as to eliminate non-contact areas with the plating solution. Since it is kept slightly higher than the pass line, as the steel strip 1 runs, the plating solution 2 flows into the upper part of the steel strip 1, that is, on the non-plated surface 1b side, as shown in FIG. , its non-plated surface 1b
The end portion 1c of the plate will also be plated. Therefore, in the case of a plated product with only one side, it will have negative effects such as spoiling the beauty during surface treatment such as painting in the subsequent process, so it will take a lot of man-hours to cut and remove the edges in advance. It is. Further, in the case of a double-sided plated product, when the non-plated surface 1b is plated in the next plating section, the thickness of the plating layer becomes thicker, causing problems such as quality 1 yield.
一方、アノード３の長さはめっき槽７で処理される鋼帯
の最大幅よりも長くするのが通常であるから、鋼帯１の
端部１ｃにおけるめっき電流密度が高くなって端部１ｃ
での錫付着量が多くなりめっき厚が厚くなるいわゆるオ
ーバコートを生ずる。On the other hand, since the length of the anode 3 is normally made longer than the maximum width of the steel strip treated in the plating bath 7, the plating current density at the end 1c of the steel strip 1 becomes high, and the plating current density at the end 1c increases.
This results in a so-called overcoat in which the amount of tin deposited increases and the thickness of the plating increases.
発明者らが調査したところによると、その−例を第６図
に示すようにエツジ部から３０鵬以内においては特に顕
著である。According to the investigation conducted by the inventors, this phenomenon is particularly noticeable within 30 meters from the edge, as shown in FIG.
このような鋼帯端部のオーバコートの防止方法としては
、例えば特開昭５４−１２８９４５号公報に開示されて
いるように、鋼帯端部とアノードとの間に遮へい板を介
在させる手段が提案されている。しかしながら、この方
法では鋼帯上部へのめっき液のまわり込みが防止できず
、また遮へい板自体がめつき液に浸漬されているから腐
食してしまい、寿命が短くかつメンテナンスコストが高
く経済的でないという欠点がある。As a method for preventing such overcoating of the steel strip end, there is a method of interposing a shielding plate between the steel strip end and the anode, as disclosed in JP-A-54-128945, for example. Proposed. However, this method does not prevent the plating solution from getting to the top of the steel strip, and since the shield plate itself is immersed in the plating solution, it corrodes, resulting in a short service life and high maintenance costs, making it uneconomical. There are drawbacks.
本発明は、上記のような問題点を一挙に解決すべくなさ
れたものであって、鋼帯の幅方向のめっき厚精度などの
向上に好適な片面めっき方法を提供することを目的とす
る。The present invention has been made to solve the above-mentioned problems at once, and an object of the present invention is to provide a single-sided plating method suitable for improving the plating thickness accuracy in the width direction of a steel strip.
く問題点を解決するための手段〉
本発明は、水平式めっき槽を用いて、鋼帯の片面もしく
は片面ずつを交互に連続的にめっきを施すに際し、めっ
き槽内を通過する鋼帯の上方から鋼帯両端部に気体を吹
き付けるようにしたことにより、上記目的を達するもの
である。Means for Solving Problems〉 The present invention provides a method for continuously plating one side or one side of a steel strip alternately using a horizontal plating tank. The above object is achieved by blowing gas from the steel strip to both ends of the steel strip.
〈作 用〉
本発明によれば、めっき中の鋼帯の端部に上方から気体
を吹き付けるようにしたので、鋼帯の端部から上面に流
れ込もうとするめっき液を阻止することが可能である。<Function> According to the present invention, since gas is blown from above onto the end of the steel strip during plating, it is possible to prevent the plating solution from flowing from the end of the steel strip to the top surface. It is.
またこの気体の噴出によって、鋼帯端部周辺のめっき液
面を押し下げることができるから、オーバコートをも防
止することが可能である。Moreover, since the plating liquid level around the end of the steel strip can be pushed down by this jet of gas, overcoating can also be prevented.
〈実施例〉 以下に、本発明を実施例に基づいて詳細に説明する。<Example> The present invention will be explained in detail below based on examples.
第１図は、本発明方法に係る実施例を示す（ａ）平面図
、（ｂ）Ａ−Ａ矢視断面図、（ｃ）Ｂ−Ｂ矢視断面図で
ある。なお、図中において従来例と同一部材は同一符号
を付して説明を省略する。FIG. 1 is (a) a plan view, (b) a cross-sectional view taken along the line A-A, and (c) a cross-sectional view taken along the line B-B, showing an embodiment of the method of the present invention. In addition, in the drawings, the same members as in the conventional example are given the same reference numerals, and the description thereof will be omitted.
図において、鋼帯ｌの両端部の斜め上方に気体を吹き出
すヘッダ２０を鋼帯１の走行方向にめっき槽７の長さに
応じて設置する。このヘッダ２０にはノズル２１が任意
ピッチで鋼帯１の端部のやや内側に臨むような角度で取
付けられる。さらに、このヘッダ２０には、図示しない
送風ブロワから清浄な空気が配管２２を介して供給され
る。In the figure, headers 20 for blowing out gas diagonally above both ends of the steel strip 1 are installed in the running direction of the steel strip 1 in accordance with the length of the plating tank 7. Nozzles 21 are attached to this header 20 at arbitrary pitches at an angle so as to face slightly inside the end of the steel strip 1. Furthermore, clean air is supplied to the header 20 via a pipe 22 from a blower (not shown).
このように構成されたヘッダ２０を用いて、めっき中の
鋼帯１の両端部１ｃに第２図に示すように空気が吹きつ
けられると、鋼帯１の非めっき面１ｂに流れ込もうとす
るめっき液２は押し戻されるとともに、この空気は鋼帯
１の表面を伝わってめっき液面に当たるからめっき液面
を鋼帯１のパスラインよりも下方に押し下げる。これに
よって綱帯ｌの端部周辺のめっき液２が少なくなるから
、端部へのめっき電流密度の集中を防ぐことができ、オ
ーバコートを防止することが可能である。When air is blown onto both ends 1c of the steel strip 1 being plated as shown in FIG. 2 using the header 20 configured in this way, air tends to flow into the non-plated surface 1b of the steel strip 1. The plating solution 2 is pushed back, and since this air travels along the surface of the steel strip 1 and hits the plating solution level, it pushes the plating solution level down below the pass line of the steel strip 1. As a result, the amount of plating solution 2 around the ends of the rope strip 1 is reduced, so that concentration of plating current density on the ends can be prevented, and overcoating can be prevented.
なお、前記ヘッダ２０は、めっき処理される鋼帯１の板
幅に応じて機幅方向に移動可能な構造とすれば、いかな
る板幅の鋼帯にも対処し得ることはいうまでもない、ま
た、ノズル２１にスリット型を用いても同様の作用効果
を有する。It goes without saying that if the header 20 is structured to be movable in the machine width direction according to the width of the steel strip 1 to be plated, it can handle steel strips of any width. Further, even if a slit type nozzle is used for the nozzle 21, similar effects can be obtained.
この実施例をハロゲンラインの錫めっき槽に適用した例
について説明する。An example in which this embodiment is applied to a halogen line tin plating bath will be described.
気体として清浄な空気を用い、ヘッダの寸法はｌ１００
ｒφＸ １２００ｍｍ ｉ！ 、ノズルは１００ ｍｍ
ピッチで１１個配列した。このヘッダを鋼帯の上方５０
ｆｆＩ１１で端部から５０閣の位置に、ノズルの吹き出
し角度を鋼帯上面に対して６０”とし、ヘッダ圧力０
、５ ｋｇ ｆ ／ ｃａで吹き付けて片面１０ｇ／
ｒｒｒのめっきを施したところ、第３図に示すような結
果を得た。Clean air is used as the gas, and the header size is l100.
rφX 1200mm i! , the nozzle is 100 mm
Eleven pieces were arranged at pitch. Place this header 50mm above the steel strip.
At a position of 50 degrees from the end with ffI11, the blowing angle of the nozzle is set to 60" with respect to the top surface of the steel strip, and the header pressure is 0.
, sprayed at 5 kg f/ca and 10 g/side on one side.
When rrr plating was applied, the results shown in FIG. 3 were obtained.
この第３図から明らかなように、鋼帯端部の錫付着量が
著しく改善されていることがわかる。As is clear from FIG. 3, it can be seen that the amount of tin deposited at the end of the steel strip has been significantly improved.
なお、本実施例は錫めっきを施すハロゲンラインについ
て説明したが、本発明はこれに限らず例えば亜鉛めっき
を施すトレイ弐など水平式めっき槽を用いるめっきライ
ン６二通用できることはいうまでもない。Although this embodiment has been described with respect to a halogen line for tin plating, the present invention is not limited to this, and it goes without saying that the present invention can be used for two plating lines 6 using a horizontal plating tank such as tray 2 for zinc plating.
〈発明の効果〉
以上説明したように、本発明によれば、鋼帯端部に気体
を吹き付けるようにしたので、鋼帯上面へのめっき液の
流れ込みを防止するとともにオーバコートを防止するこ
とができるから、鋼帯幅方向のめっき厚精度を向上させ
ることが可能である。<Effects of the Invention> As explained above, according to the present invention, since gas is blown onto the end of the steel strip, it is possible to prevent the plating solution from flowing into the upper surface of the steel strip and to prevent overcoating. Therefore, it is possible to improve the plating thickness accuracy in the width direction of the steel strip.
また、従来の浸漬型遮へい板に比べ簡単に取付けること
ができ、かつ経済的である。Furthermore, it is easier to install and more economical than conventional immersion type shielding plates.
第１図は、本発明方法に係る実施例を示す（ａ）平面図
、（ｂ）Ａ−Ａ矢視断面図、（ｃ）Ｂ−Ｂ矢視断面図。
第２図は、本発明の作用を模式的に示す説明図。
第３図は、本発明方法による錫付着分布を示す特性図、
第４図は、従来例を模式的に示す（ａ）側断面図、（ロ
）Ｃ−Ｃ矢視断面図、第５図は、従来例の問題点を模式
的に示す説明図、第６図は、従来例による傷付着分布を
示す特性図である。
１・・・鋼帯、 ２・・・めっき？夜。
７・・・めっき槽。
２０・・・ヘッダ、２１・・・ノズル
特許出願人 川崎製鉄株式会社
第 １
（ａ）
図 、ｌ、）（（゛）
第 ２ 図
第 ３ 図
鋼板エツジからの距離 （順）
第 ５ 図
第 ６ 図1A and 1B are (a) a plan view, (b) a cross-sectional view taken along the line A-A, and (c) a cross-sectional view taken along the line B-B, showing an example of the method of the present invention. FIG. 2 is an explanatory diagram schematically showing the effect of the present invention. FIG. 3 is a characteristic diagram showing tin adhesion distribution according to the method of the present invention;
4 is (a) a side sectional view schematically showing a conventional example, (b) a sectional view taken along the line C-C, FIG. 5 is an explanatory diagram schematically showing problems in the conventional example, and FIG. The figure is a characteristic diagram showing the flaw adhesion distribution according to the conventional example. 1...Steel strip, 2...Plating? night. 7... Plating tank. 20...Header, 21...Nozzle Patent applicant Kawasaki Steel Corporation No. 1 (a) Figure , l, ) ((゛) Figure 2 Figure 3 Figure Distance from steel plate edge (in order) Figure 5 6 Figure
Claims (1)
を交互に連続的にめっきを施すに際し、めっき槽内を通
過する鋼帯の上方から鋼帯両端部に気体を吹き付けるよ
うにしたことを特徴とする鋼帯の片面めっき方法。When plating one side or one side of a steel strip in succession using a horizontal plating tank, gas is blown onto both ends of the steel strip from above the steel strip passing through the plating tank. A unique single-sided plating method for steel strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12021187A JPS63286596A (en) | 1987-05-19 | 1987-05-19 | One-side plating method for steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12021187A JPS63286596A (en) | 1987-05-19 | 1987-05-19 | One-side plating method for steel strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63286596A true JPS63286596A (en) | 1988-11-24 |
Family
ID=14780649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12021187A Pending JPS63286596A (en) | 1987-05-19 | 1987-05-19 | One-side plating method for steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63286596A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04228597A (en) * | 1990-12-27 | 1992-08-18 | Kawasaki Steel Corp | Method for preventing edge overcoating in horizontal plating device |
-
1987
- 1987-05-19 JP JP12021187A patent/JPS63286596A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04228597A (en) * | 1990-12-27 | 1992-08-18 | Kawasaki Steel Corp | Method for preventing edge overcoating in horizontal plating device |
| JPH0791675B2 (en) * | 1990-12-27 | 1995-10-04 | 川崎製鉄株式会社 | Horizontal Plating Equipment Edge Overcoat Prevention Method |
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